In the -2c mode, in presence of extern types, I was defining them as int.
The idea was to have something that compiles, and then to ask the user
to redefine its extern types.

Now I define extern types as string (char*).

The rationale of this change is that before, the generated code was only
working for int, which is pretty useless as an extern type.

Have string by default is actually much more useful, for instance to use
string in a Lustre program.

Also, adapt to changes done in lutils, where the string type has ben added.
(sha:8619aa285ca8322ab9, i.e., > lutils  1.49.10)

I was re-implementing an inneficient topological sort there (using a
linear list instead of logarithmic map). I win 1s on tri.ec (~8000
locals).

Also, force a workflow (via a lock file named commited) that make
sure that the content of lv6version.ml is always correct xrt shat and
git commit number.

Also add support to rdbg to perform nonreg test. I do not plug yet it
as it's twice slower. but most of it seems due patch_ecexe. Indeed,
lus2lic -interface compile the whole program just to print the node
interface.

nb: it has detected a couple of existing bugs.

Fix a bug in socExec.ml (strangely untriggered before) along the way.

Timothy Bourke (trigerred where the clock of some args are some other
args and when the names of variables are shared between the caller
and the callee).

The problem is in UnifyClock.f or (in evalClock.ml) ; the current
change in evalClock.ml fixes the pb in Tim's program, but I suspect
it is still buggy.

I took the data type definition from SocExecValue to define a Data
module that is a strict extension of the Lutin Data module.

The duplicated Genlex module is now also identical to the one of
Lurette.

Quite boring, but simple thanks to the ocaml type system.

+ remise en place du souk qu'il a mis dans le repertoire test.

- il a commencé à rajouter le CondAct (tout est parti de la en fait...)
- il a coupé le LazyCompiler en morceaux

Pour cela, il a créé un nouveau module LicPrg qui définit la
structure de données (SDD) en sortie du LazyCompiler. Ensuite, les
diverses tranformations src2src sont faites à partir de cette SDD.

- il a débranché (temporairement) l'expansion de noeud et de array/structure

- il a débranché ma pseudo inférence de type et a mis à la place une
vérification de types.

- Le traitement du polymorphisme est effectué via une transfo src2src
dans DoNoPoly (que je vais renommer en RmPoly)

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Par ailleurs,

J'ai créé un todo.org et un README.org que je vais essayer de tenir à jour.

nb: les tests ne passent toujours bien sur.

Add a -tlex option to debug the lexer.

Also, rename the rules in parser.mly now that their appear in the manual.
This renaming work is in progress though.

not compile them is (well, was) the default...).

also, during pretty-printing, remove the type in the constant definition
(e.g., "const x = 42;" instead of "const x = 42:int;"), except if it is an abstract
constant of course